T-Mobile USA and RIM Launch The New BlackBerry 7105t and New BlackBerry Internet E-mail Service for Yahoo! Mail Users

Bellevue, Washington and Waterloo, ON - T-Mobile USA and Research In Motion (RIM) (Nasdaq: RIMM: TSX: RIM) today announce the availability of the new BlackBerry® 7105t™ together with a new BlackBerry Internet E-mail™ service for Yahoo! Mail users. Whether in a meeting or out on the road, this new BlackBerry device and service offers an unmatched e-mail experience, providing busy professionals with the freedom to easily manage both corporate and personal messages, while on the go.

“RIM and T-Mobile have once again partnered to give consumers an even easier out-of-the-box experience for BlackBerry users,” said John Clelland, Senior Vice President of Segment Marketing for T-Mobile USA. “Now with enhanced Yahoo! Mail access, T-Mobile customers will be able to easily manage their personal and corporate e-mail all from the new BlackBerry 7105t .”

Yahoo! Mail is the No. 1 e-mail service in the world.* Through T-Mobile, Yahoo! and BlackBerry – three brands that customers highly rely on for their communication needs – users will enjoy enhanced mobile access to their Yahoo! Mail accounts directly on their BlackBerry handset. With this new service, users will experience real-time delivery of e-mail messages sent to their Yahoo! Mail accounts, and enhanced wireless synchronization of sent and deleted items as well as read/unread message status. For example, Yahoo! Mail messages deleted on a BlackBerry handset can be automatically deleted in the consumers’ Yahoo! Mail account. In addition, users now have the ability to select different “sent from” addresses when sending a message – providing users with even more flexibility to manage both corporate and personal e-mail accounts while on the go. This service is now available for all T-Mobile USA BlackBerry customers.

“Today’s busy mobile professionals are always on the go and need a simple way to stay connected throughout the day. BlackBerry has become the communications tool of choice for mobile professionals that want greater freedom and flexibility,” said David Castell, Vice President, Retail Business Unit at Research In Motion. “Working together with T-Mobile and Yahoo!, we are now making it even easier for customers to communicate by enabling real-time access to Yahoo! Mail from their BlackBerry handset.”

Yahoo! is the first Internet e-mail provider to take advantage of the full suite of new integration options available via BlackBerry Internet Service™ to provide real-time, push-based delivery of Yahoo! Mail to T-Mobile customers. The new BlackBerry Internet E-mail service from T-Mobile is a component of BlackBerry Internet Service and provides enhanced integration and wireless synchronization with e-mail accounts, the ability to use multiple “sent from” addresses and one-click set up to further simplify the out-of-box user experience. For individuals and smaller businesses, BlackBerry Internet E-mail™ allows users to access up to ten corporate and/or personal e-mail accounts (including Microsoft® Exchange, IBM® Lotus Domino™ and many popular ISP e-mail accounts) from a single device.

T-Mobile USA customers can enjoy this service using the new BlackBerry 7105t, a full-featured wireless device that maintains the features that BlackBerry 7100t™ users have enjoyed – quad-band phone, Bluetooth® technology, speakerphone, wireless e-mail, text messaging, web browser, instant messaging, organizer, and RIM’s SureType™ technology. In addition, the BlackBerry 7105t features enhancements such as a new scratch-resistant, easy-to-read high-resolution color screen, larger send and end keys, and contoured keys for easier typing.

The BlackBerry 7105t from T-Mobile USA is available at T-Mobile retail stores, select authorized dealers, online at www.t-mobile.com/blackberry, or by calling 1-800-T-MOBILE.

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